Thomas Friends Color Changers Diesel Metal Collection New in Package Preschool kids can recreate their favorite railway stories from the Thomas and Friends: All Engines Go! series with these die-cast metal push-along toy train engines with awesome color-changing action! Kids can collect their favorite characters from the series and watch as the engines change color when placed in water. Its like having 2 engines in 1! Reveal hidden decorations on each engine by changing the water temperature from warm to icy cold (and back again). Each engine sold separately and subject to availability.